After a dragon attacks Ponyville, Twilight discovers she has a strange new ability. What does it have to do with the dragons that are cropping up everywhere, and what will it mean for Equestria? (Skyrim Crossover)

Set in the far future after Celestia and Luna mysteriously vanished and the sun and moon froze in the sky, Antipodes is the story of two ponies thrust out into the harsh new world on an adventure to uncover what happened to the world so long ago.

(I wrote this when I was 17. it's pretty rough in places, but i think the basic ideas i had here were pretty cool. it's got a good skeleton)

Spanish translation here: https://www.deviantart.com/spaniard-kiwi/art/Antipodas-1-3-953524835

After failing to stop Nightmare Moon in the ancient castle of the pony sisters, Twilight Sparkle is left with a scar that will permanently change the rest of her natural born life. As Twilight recovers from her ordeal, she finds that she is left with a difficult choice. Either live her life as a lie or sacrifice her innocence to protect the ones she loves. The path before her is set and she must now walk it alone. The sands of time continues ever onward, with everyone already trapped in its muddy depths. The sun will rise and the sun will fall. Waiting for its call, Death awaits for all.

Tags, rating, and characters can change.

Art created by:
http://cuteskitty.deviantart.com (top)
http://ventious.deviantart.com (bottom)

I just put the two together

Twilight is invited to Canterlot to compete with some of the greatest magicians in the world for the Moonstone Cup, a prestigious award for the most powerful and skillful magicians, unicorn and otherwise. Can she win? What sort of competition will she face?

Awesome cover image was taken from NoOneBahtim

Inspired by the heroics of the mysterious mare known as the Stable Dweller, Silver Storm, a guard of the town of Marefort, decides to go on a daring mission to rescue her captured brother. Of course things rarely go as planned and her attempts at heroism drags her into a tangled web of plots and conspiracies as warring factions vie for control over the last great city: Dise.

Spanish Version translated by Spaniard-Kiwi: https://www.deviantart.com/spaniard-kiwi/art/Fallout-Ecuestria-Heroes-996263393

A horrible Cataclysm has turned all of Equestria into a Wasteland of barren ash and twilight desolation. The Sun and the Moon have been destroyed. Everypony has died--including Princesses Luna and Celestia. But one pony miraculously survives; she is a lone wanderer, the last of her kind, surrounded by menacing creatures that hate her. She navigates the Wastes in an airship and scavenges off the blighted landscape to keep herself alive.

Then one day she meets an old companion who grants her a gift, the chance to go back in time to the warm and sunny days of Ponyville, where her dead friends live in happiness. How far will the last pony venture into this joyous age of Equestria, even if she fully knows that there is no way to change the horrible fate of everypony she loves?

2013 Edition: Smaller Chapters, Better Grammar, and a Few New Scenes

(A shout-out to Vimbert, pre-reader and gentlecolt)

After surviving the dreaded Order 66, Jedi knight Joseph Malek has a near-death experience, in which he visits the most powerful being in existence. The strange being tells him of a future visit to its world before sending him back to his own existence. Twenty years later, while on a mission for the Rebellion, Malek accidentally stumbles upon a secret new world when his ship is damaged. The world’s Ruler, Princess Celestia, welcomes him and offers to aid in his ship's repairs. While there, Malek averts disaster when he stops a mutiny with the help of the planet’s inhabitants.

Now he must keep the world’s existence a secret when he travels back to his own dimension, which is rather hard when one if its people decides to sneak back with him.

(edited by Flutterguy_6996. thanks for the help.)
(note: long periods between updates. sorry.)

Cancelled, but preserved for posterity.

Archer is not having a good day. He's recently been knocked unconscious and imprisoned by a Fae race, notorious for their animosity towards humans and each other. Instead of cannibalistic Merfolk or mischievous Fairies, he finds... talking ponies. Who want him to be their "friend."

He is sentenced to remain in a small town they call "Eqshana", until he can learn to "live in harmony" with its inhabitants. Unfortunately, a message from his king, Jove V, has turned his prison sentence into a mission of espionage. Now he must escape these no-doubt insidious creatures, and even more importantly, stay sane doing it. Along the way, he will answer one of the most important questions he has ever faced: Is there really nothing to eat around here besides hay?

Finding herself with wings and unusually powerful magic, Twilight Sparkle proceeds to have breakdown after breakdown, until with the help of her friends, she confronts Celestia and Luna about it... And learns that she's a far more important little pony than she ever imagined - for all the wrong reasons.

Awesome painting by Drezzer can be found here!

20 megapixel version is here (10MB JPEG, 210dpi strangely, 24"x20")!

Thanks, man!

Having lost much of her past, memories and purpose in life, Aurora Borealis stumbles upon the junkyard and its sole inhabitant Scraps. Having regained her name and desiring to find her past and place in the world, she begins to walk the paths of discovery. But what she finds and what impact she has may be more than she ever expected.